Double-speed-ratio water-air dual-purpose power device

Abstract

The invention discloses a double-speed-ratio water-air dual-purpose power device. The double-speed-ratio water-air dual-purpose power device mainly comprises a power input device, a rotating speed switching device and paddles. The power input device always provides power in a high-rotating-speed and low-torque state under different media, and the rotating speed switching device converts power input into torque meeting the requirements of the media through a one-way bearing and a planetary speed reduction mechanism under different media. When the power unit is in the air, the planetary reducing mechanism loses action, the output of the rotating speed switching device is equal to the rotating speed and torque of the power input device, when the power unit is in the water, the planetary reducing mechanism operates, and the output rotating speed of the rotating speed switching device is smaller than the rotating speed of the power input device. The torque output by the rotating speed switching device is larger than that of the power input device. The output shaft of the rotating speed switching device drives the passive folding propeller to provide power, and the passive folding propeller can passively stretch, fold and contract according to different rotating speeds and media, so that high efficiency under different media is ensured.

Description

Technical Field

[0001] The invention belongs to the field of propulsion technology, and in particular relates to a dual-speed ratio water-air dual-purpose power device. Background Art

[0002] Cross-medium cruisers are currently very popular at home and abroad, and related research has made initial progress. The University of Bristol in the UK has developed a bionic wing structure that can be used in underwater cross-medium vehicles. It imitates the fins of fish and uses flapping wings as a power source. The Beijing University of Aeronautics and Astronautics has developed a booby-like underwater cross-medium vehicle. The wing is a hollow structure, and the wing sweep angle can be adjusted according to different working conditions. The prototype focuses on water-air cross-domain capabilities. Due to power constraints, it is impossible to perform too many degrees of freedom underwater. The University of Auckland has developed the Loon Copter cross-domain vehicle, which uses a buoyancy tank to complete buoyancy and diving. Harbin Engineering University has developed the Longbow series of underwater cross-medium vehicles, which adopt a fixed-wing and folding-wing configuration to complete the tasks of flying in the air, cruising on the water surface, and sailing underwater.

[0003] The above-mentioned water-air cross-domain cruisers all use different power and buoyancy units, such as flapping-wing power units, propeller power units, etc. However, they all have some defects. The flapping-wing power unit can navigate freely underwater, but because it is a soft structure, it cannot complete aerial flight movements, and the propeller power unit has a small torque range, and its ability and range of activity underwater are limited. Therefore, the propulsion unit of the water-air cross-domain cruiser has become one of the cores in this field. This type of propulsion unit must not only meet extremely high speed requirements, but also meet large torque range requirements, so it is necessary to develop a new type of water-air propulsion unit.

[0004] Chinese patent CN114516396B discloses a miniature dual-speed water-air dual-purpose propeller, including: a power device, a speed switching device, a propeller shaft, an extension area adaptive device and a blade; wherein, when the transmission main shaft rotates forward, the speed switching device drives the propeller shaft to rotate at a first speed, so that the length direction of the blade and the radial direction of the propeller shaft form a first angle; when the transmission main shaft rotates reversely, the speed switching device drives the propeller shaft to rotate at a second speed, so that the length direction of the blade and the radial direction of the propeller shaft form a second angle. When the rotating main shaft rotates forward, the speed of the propeller shaft is high, the extension area of ​​the blade is large, and a large area of ​​high-speed airflow is generated, which is suitable for working in the air; when the rotating main shaft rotates reversely, the speed of the propeller shaft is low, the extension area of ​​the blade is small, and the surrounding wake is used to reduce the additional mass caused by the operation of the blade, which is suitable for working in water. However, the gears of some reducers of the speed switching device of the invention need to be customized, which results in low accuracy during the gear meshing process. At the same time, the wave teeth are switched by levers, and the strength of the four levers belongs to a structural mode in which the force line is not closed. When transmitting large torque, the original reducer is prone to structural deformation. In addition, the reducer of the invention does not use soft gears, but uses two hard gears to simulate soft gears. In actual applications, the tooth shape of the gear must be secondary processed on the basis of the original involute. This results in that the reduction ratio of the original reducer cannot be arbitrarily matched, and can only be matched with some ratios with special values. The transmission spindle of the reducer needs to be tightly matched with the power motor (that is, changing the shaft, removing the drive shaft of the original motor and replacing it with the drive shaft of the reducer), which will cause slight damage to the original internal structure of the motor, and may cause looseness in severe cases. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a dual-speed ratio water-air dual-purpose power device.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a dual-speed ratio water-air dual-purpose power device, comprising:

[0008] Power input device;

[0009] A speed conversion output device connected to an input drive shaft of the power input device;

[0010] An output adapter plate connected to the output gear shaft of the speed conversion output device;

[0011] A blade adaptive rotation device connected to the output adapter plate;

[0012] a blade, rotatably connected to the blade adaptive rotation device;

[0013] A pipe clamp connected to the housing of the speed conversion output device;

[0014] Wherein, when the input transmission shaft of the power input device rotates counterclockwise at a first speed, the speed conversion output device drives the blade to rotate counterclockwise at a first speed with a radius of a first preset value;

[0015] When the input transmission shaft of the power input device rotates clockwise at a first speed, the speed conversion output device drives the blade to rotate counterclockwise at a second speed with a radius of a second preset value;

[0016] The first rotation speed is greater than the second rotation speed, and the first preset value is greater than the second preset value.

[0017] Furthermore, the power input device includes: an input transmission shaft and a first deep groove ball bearing.

[0018] Furthermore, the input transmission shaft body is in an irregular cylindrical shape and is used to transmit power from an external motor. The input transmission shaft is tightly fitted with multiple components of the speed conversion device, and the input transmission shaft is fixedly sleeved with the motor shaft of the external device driving motor by a top screw.

[0019] Furthermore, the first deep groove ball bearing is sleeve-connected with the input transmission shaft in a tight fit.

[0020] Further, the speed conversion output device includes: a housing, a one-way bearing, an inner gear ring, a planet carrier, a sun gear, a planet gear, an intermediate gear, an output gear shaft, a second deep groove ball bearing, and a third deep groove ball bearing;

[0021] Furthermore, the one-way bearing is tightly fitted and sleeved with the input transmission shaft; the inner gear ring is tightly fitted and sleeved with the one-way bearing; the planetary carrier is tightly fitted and connected with the input transmission shaft; the sun gear is fixedly connected with the input transmission shaft; the planetary gear includes two upper and lower gear fixing kits, the radius of the lower gear is larger than the radius of the upper gear, the planetary gear is tightly fitted and sleeved with the planetary carrier, the lower gear is meshed with the sun gear and the inner gear ring, and the upper gear is meshed with the output gear shaft and the intermediate gear; the second deep groove ball bearing is tightly fitted and sleeved with the output gear shaft; the third deep groove ball bearing is sleeved with the second deep groove ball bearing, the number of teeth of the sun gear is smaller than the number of teeth of the lower gear of the planetary gear, and the intermediate gear is meshed with the upper gears of multiple planetary wheels.

[0022] Furthermore, the planet carrier is generally in a flat elliptical shape, and the protrusions at both ends are sleeved with the planetary wheels.

[0023] Furthermore, the output adapter plate is fastened to the output gear shaft of the speed conversion output device by means of screws.

[0024] Furthermore, the blade adaptive rotation device includes: a blade mounting shaft and a blade adaptive adjustment device.

[0025] Furthermore, the blade mounting shaft is connected to the output adapter plate, the blade adaptive adjustment device is spirally connected to the blade mounting shaft, and is fastened to the blade via a hinge.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] (1) Compared with other propellers, the present invention has a larger torque and speed output range, so that it can be used in both water and air. The present invention has a simple structure, low complexity, and light weight, which is suitable for the harsh load requirements of dual-use water and air UAVs.

[0028] (2) The present invention solves the problems in the prior art such as the structure being easily deformed, the reduction ratio being unable to be arbitrarily matched, and the internal structure being easily damaged and loosened by using a planetary reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention when the blade radius is a first preset value;

[0030] Figure 2 It is a schematic diagram of the structure of the present invention when the blade radius is a second preset value;

[0031] Figure 3 It is a partial cross-sectional view of the present invention;

[0032] Figure 4 is a first exploded view of the present invention;

[0033] Figure 5 is a second exploded view of the present invention;

[0034] Figure 6 is a cross-sectional view of the present invention;

[0035] Figure 7 A top view of the present invention;

[0036] The reference numerals in the figure are: 10, power input device, 101, input transmission shaft, 102, first deep groove ball bearing, 20, speed conversion output device, 201, housing, 202, one-way bearing, 203, inner ring gear, 204, planetary carrier, 205, sun gear, 206, planetary gear, 207, intermediate gear, 208, output gear shaft, 209, second deep groove ball bearing, 2010, third deep groove ball bearing, 30, output adapter plate, 40, blade adaptive rotation device, 401, blade mounting shaft, 402, blade adaptive adjustment device, 50, blade, 60, pipe clamp. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] This embodiment provides a dual-speed ratio water-air dual-purpose propeller, such as Figure 1 Figure 2 As shown, it mainly includes the following specific contents:

[0039] 1) A power input device 10, wherein the power input device 10 is connected to an external drive motor;

[0040] 2) a speed conversion output device 20 connected to the input transmission shaft 101 of the power input device 10;

[0041] 3) an output adapter plate 30 connected to the output gear shaft 208 of the speed conversion output device 20;

[0042] 4) a blade adaptive rotation device 40 connected to the output adapter plate 30;

[0043] 5) a blade 50, rotatably connected to the blade adaptive rotation device 40;

[0044] 6) A pipe clamp 60 connected to the housing 201 of the speed conversion output device 20 .

[0045] When the input transmission shaft 101 rotates counterclockwise at the first speed, the output gear shaft 208 of the speed conversion output device 20 rotates counterclockwise at the first speed; when the input transmission shaft 101 rotates clockwise at the first speed, the output gear shaft 208 of the speed conversion output device 20 rotates counterclockwise at a reduced speed at the second speed.

[0046] The first rotation speed is greater than the second rotation speed.

[0047] When the output gear shaft 208 of the speed conversion output device 20 rotates, the output adapter plate 30 connected thereto rotates accordingly, and finally drives the blade adaptive rotating device 40 and the blade 50 to rotate in a shape with a radius of R1, as shown in FIG. Figure 1 When the output gear shaft 208 of the speed continuous conversion output device 30 is decelerated, the blade adaptive rotation device 40 and the blade 50 are finally driven to rotate in a shape with a radius of R2, as shown in FIG. Figure 2 The radius R1 is greater than the radius R2.

[0048] It is worth noting that the power input device 10 is the main device for providing driving force. The speed conversion output device 20 refers to a device that uses the power input device 10 as a power input source, and obtains two different speed ratio output devices that can rotate in the same direction by using the different clockwise and counterclockwise rotation directions of the power input source. The output adapter plate 30 refers to an intermediate device that is fixedly connected to the speed conversion output shaft and drives the blade adaptive rotation device 40 and the blade 50 to rotate. The blade adaptive rotation device 40 refers to a device for passively adaptively adjusting the blade radius. Specifically, the blade radius is passively adjusted according to the rotation speed of the speed conversion output shaft. When the speed of the speed continuous conversion output shaft is high, the blade 50 is passively opened and the radius increases. When the speed of the speed continuous conversion output shaft is low, the blade 50 is passively bent and the radius decreases. The two blade shapes correspond to the adaptive shapes of propeller blades in the air and underwater respectively. In the air, due to the low air density, the blades can be in the form of long blades to obtain higher air flux and generate aerodynamic force by high-speed rotation; in the water, due to the high density of water and its resistance, the blades need to be in the form of short blades to obtain hydrodynamic force.

[0049] In summary, the water-air dual-purpose propeller provided by the present invention uses the power input device 10 as the input source, and the speed conversion output device 20 generates the output speed according to the input speed and direction of the power input device 10. The directions of the two input speeds are different, so that the output speed has two different speed ratios. When the input speed is counterclockwise, it will drive the blade adaptive rotation device 40 to rotate at a high speed, and the blade 50 will be passively opened and rotate at a high speed in the form of a long blade. This form is suitable for obtaining aerodynamic force in the air; when the input speed is clockwise, it will drive the blade adaptive rotation device 40 to rotate at a low speed. When the blade is in the water, due to the large resistance in the water, the blade 50 is passively bent. At this time, the blade rotates at a low speed to obtain hydrodynamic force.

[0050] It is worth noting that, since the resistance of air is very small and the resistance of water is relatively large, the dual-purpose water-air propeller is required to provide a larger torque output range. In the air, the propeller should be in a state of small torque and high speed; in the water, the propeller needs to be in a state of large torque and low speed, which conforms to the law of torque and speed changes, but the torque range of general power mechanisms (motors) is difficult to meet such requirements. The above is one of the difficulties in the design of dual-purpose water-air UAVs. Compared with other propellers, the present invention is characterized in that the propeller has a larger torque and speed output range, so that it can be used in both water and air media. The structure of the present invention is relatively simple, the complexity is not high, and the weight is relatively light, which is suitable for the harsh conditions of water-air dual-purpose UAVs for load requirements.

[0051] In a preferred implementation of the embodiment of the present invention, Figure 3 Figure 4 As shown, the power input device 10 includes: an input transmission shaft 101, the main body of the input transmission shaft 101 is irregularly cylindrical, mainly used to transmit the power of the external motor, and the input transmission shaft 101 is tightly matched with multiple components of the speed conversion device 20. A first deep groove ball bearing 102, the first deep groove ball bearing 102 is tightly sleeved with the input transmission shaft 101. The input transmission shaft 101 is fixedly sleeved with the motor shaft of the external device driving motor through a top screw.

[0052] like Figure 5 Figure 6 The speed conversion output device 20 shown includes: a housing 201, which is the housing of the speed conversion device 20. The speed conversion component of the speed conversion device 20 is located inside the housing 201. The output adapter plate 30 is sleeved with the output gear shaft 208 of the speed conversion component in the speed conversion device 20 and extends to the outside of the housing 201. A one-way bearing 202, which is sleeved with the input drive shaft 101 in a tight fit. A one-way bearing refers to a bearing that only allows rotation in one direction. Its function in the present invention is to change the rotation direction of the speed conversion component of the speed conversion device 20. As shown in FIG. Figure 7 As shown, the inner gear ring 203 is in a tight fitting sleeve connection with the one-way bearing 202. When the one-way bearing 202 is driven to rotate, the inner gear ring 203 will be driven to rotate in the same direction. The inner gear ring 203 is a part of the planetary gear speed change mechanism inside the speed conversion device 20. The planet carrier 204 is in a tight fitting connection with the input transmission shaft 101. The planet carrier 204 is generally flat and elliptical, and the protrusions at both ends are used to sleeve the planetary gear 206. The sun gear 205 is fixedly connected to the input transmission shaft 101. The planetary gear 206 is in a tight fitting sleeve connection with the planetary gear 206. The planetary gear 206 is a fixed set of upper and lower gears. The lower gear is larger and meshes with the sun gear 205 and the inner gear ring 203, and the upper gear is smaller and meshes with the output gear shaft 208 and the intermediate gear 207. An intermediate gear 207, the intermediate gear 207 is meshed with the upper gear of the planetary gear 206. An output gear shaft 208, the output gear shaft 208 is meshed with the upper gear of the planetary gear 206. A second deep groove ball bearing 209, the second deep groove ball bearing 209 is sleeved with the output gear shaft 208 in a tight fit. A third deep groove ball bearing 2010, the third deep groove ball bearing 2010 is sleeved with the second deep groove ball bearing 209.

[0053] The output adapter plate 30 is fastened to the output gear shaft of the speed conversion output device 20 by screws.

[0054] The blade adaptive rotation device 40 comprises: a blade installation shaft 401, which is connected to the output adapter plate 30; and a blade adaptive adjustment device 402, which is spirally connected to the blade installation shaft 401 and is fastened to the blade 50 via a hinge.

[0055] In a preferred implementation of the embodiment of the present invention, Figure 3 Figure 4 As shown, when the power input device 10 is driven by the external motor to rotate, the input transmission shaft 101 of the power input device 10 is driven to rotate, and the rotation direction and speed of the input transmission shaft 101 are consistent with the rotation direction and speed of the external motor shaft. Whether the output gear shaft 208 of the speed conversion device 20 rotates at the first speed or the second speed depends on whether the one-way bearing 202 of the speed conversion device 20 allows the input transmission shaft 101 of the power input device 10 to rotate.

[0056] It is particularly noted that if the one-way bearing allows the internal transmission device to rotate clockwise, then when the input drive shaft 101 of the speed conversion assembly inside the speed conversion device 20 rotates clockwise, the inner ring and the outer ring of the one-way bearing will rotate relative to each other. At this time, the one-way bearing does not play a role for the speed conversion device 20; conversely, when rotating counterclockwise, the one-way bearing does not allow the input drive shaft 101 to rotate counterclockwise, that is, the inner ring and the outer ring of the one-way bearing are driven to rotate counterclockwise in the same direction, that is, the input drive shaft 101 drives the one-way bearing 202 to rotate counterclockwise together.

[0057] Generally, when the one-way bearing 202 of the speed conversion device 20 does not allow the input transmission shaft 101 of the power input device 10 to rotate in the current rotation direction, the output gear shaft 208 of the speed conversion device 20 rotates at a first speed, and the rotation direction is consistent with the rotation direction and speed of the input transmission shaft 101. When the one-way bearing 202 of the speed conversion device 20 allows the input transmission shaft 101 of the power input device 10 to rotate, the output gear shaft 208 of the speed conversion device 20 rotates at a second speed, and the rotation direction is opposite to the rotation direction of the input transmission shaft 101, and the speed is decelerated by the speed conversion device 20, and the first speed is greater than the second speed. Finally, the output gear shaft 208 of the speed conversion device 20 drives the output adapter plate 30 and the blade mounting shaft 401 of the blade adaptive rotating device 40 to rotate. Correspondingly, the blade mounting shaft 401 of the blade adaptive rotating device 40 drives the blade adaptive adjusting device 402 and the blade 50 of the blade adaptive rotating device 40 to rotate.

[0058] It is worth noting that the first speed is the same as the speed of the external drive motor, the second speed is the speed after being decelerated by the speed conversion device 20, and the first speed is greater than the second speed. In addition, regardless of the direction of the speed of the external drive motor, the rotation direction of the output gear shaft 208 of the speed conversion device 20 is the same direction.

[0059] Specifically, the output speed of the invention is assumed to rotate counterclockwise as positive, and clockwise as negative. It is assumed that the one-way bearing 202 of the speed conversion device 20 allows the input drive shaft 101 of the power input device 10 to rotate in the clockwise direction. When the input drive shaft 101 of the power input device 10 rotates counterclockwise at a first speed, the one-way bearing 202 of the speed conversion device 20 is stuck with the input drive shaft 101 of the power input device 10, and the two rotate together in the counterclockwise direction, and then the one-way bearing 202 drives the inner gear ring 203 to rotate in the counterclockwise direction. Since the sun gear 205 is fixed on the input drive shaft 101, the sun gear 205 also rotates counterclockwise around the input drive shaft 101 at the same speed as the input drive shaft 101.

[0060] It is particularly noted that, in this case, the rotation direction and rotation speed of the inner gear ring 203 are completely consistent with the rotation direction and rotation speed of the sun gear 205, which will cause the planetary gear 206 respectively meshing with the inner gear ring 203 and the sun gear 205 to also passively revolve around the input drive shaft 101 or the sun gear 205 in a counterclockwise direction at the same speed.

[0061] When the planetary gear 206 passively revolves in the counterclockwise direction, the upper pinion of the planetary gear 206 drives the output gear shaft 208 to rotate counterclockwise at the same speed. Then the output gear shaft 208 drives the output adapter plate 30, the adaptive rotating device 40 and the blade 50 to rotate in the counterclockwise direction, and the speed is the same as the speed of the input transmission shaft 101, which is the first speed.

[0062] For another case, when the external drive motor rotates clockwise at the first speed, the input transmission shaft 101 of the power input device 10 rotates clockwise at the first speed. Since the one-way bearing 202 of the speed conversion device 20 allows the input transmission shaft 101 of the power input device 10 to rotate, the input transmission shaft 101 of the power input device 10 drives the sun gear 205 to rotate clockwise at the first speed. Since the sun gear 205 is meshed with the lower gear of the planetary gear 206, and since the number of teeth of the sun gear is less than the number of teeth of the lower gear of the planetary gear 206, the sun gear 205 drives the planetary gear 206 to rotate counterclockwise at a speed A, and the upper pinion of the planetary gear 206 drives the output gear shaft 208 to rotate counterclockwise at a speed A, and this speed A is the second speed. Then, the output gear shaft 208 drives the output adapter plate 30 , the adaptive rotating device 40 and the blade 50 to rotate in a counterclockwise direction, and the rotation speed is the same as the rotation speed of the output gear shaft 208 , which is the second rotation speed.

[0063] In this case, the speed conversion device 20 plays the role of reducing speed and increasing torque.

[0064] It is worth noting that the intermediate gear 207 of the speed conversion device 20 does not play a role in any process. Its main function is to ensure the reliability of the planetary gear 206 of the speed conversion device 20 during operation. Therefore, the intermediate gear 207 is designed to mesh with the two planetary gears 206 to ensure that the planetary gears are not deformed by external force.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A dual-speed ratio water-air dual-purpose power device, characterized in that: include: A power input device (10); A speed conversion output device (20) connected to an input transmission shaft (101) of a power input device (10); An output adapter plate (30) connected to an output gear shaft (208) of the speed conversion output device (20); A blade adaptive rotation device (40) connected to the output adapter plate (30); a blade (50) rotatably connected to the blade adaptive rotation device (40); A pipe clamp (60) connected to a housing (201) of the speed conversion output device (20); When the input transmission shaft (101) of the power input device (10) rotates counterclockwise at a first speed, the speed conversion output device (20) drives the blade (50) to rotate counterclockwise at a first speed with a radius of a first preset value; When the input transmission shaft (101) of the power input device (10) rotates clockwise at a first speed, the speed conversion output device (20) drives the blade (50) to rotate counterclockwise at a second speed with a radius of a second preset value; The first rotation speed is greater than the second rotation speed, and the first preset value is greater than the second preset value.

2. A dual-speed ratio water-air dual-purpose power device according to claim 1, characterized in that: The power input device (10) comprises: an input transmission shaft (101) and a first deep groove ball bearing (102).

3. A dual-speed ratio water-air dual-purpose power device according to claim 2, characterized in that: The main body of the input transmission shaft (101) is in an irregular cylindrical shape and is used to transmit power of an external motor. The input transmission shaft (101) is tightly matched with multiple components of the speed conversion device (20). The input transmission shaft (101) is fixedly sleeved with the motor shaft of the external device driving motor via a jackscrew.

4. A dual-speed ratio water-air dual-purpose power device according to claim 2, characterized in that: The first deep groove ball bearing (102) is sleeve-connected with the input transmission shaft (101) in a tight fitting manner.

5. The dual-speed ratio water-air dual-purpose power device according to claim 1, characterized in that: The speed conversion output device (20) comprises: a housing (201), a one-way bearing (202), an inner gear ring (203), a planet carrier (204), a sun gear (205), a plurality of planetary gears (206), an intermediate gear (207), an output gear shaft (208), a second deep groove ball bearing (209), and a third deep groove ball bearing (2010).

6. A dual-speed ratio water-air dual-purpose power device according to claim 5, characterized in that: The one-way bearing (202) is sleeve-connected with the input transmission shaft (101) in a tight fitting manner; the inner gear ring (203) is sleeve-connected with the one-way bearing (202) in a tight fitting manner; the planet carrier (204) is connected with the input transmission shaft (101) in a tight fitting manner; the sun gear (205) is fixedly connected with the input transmission shaft (101); the planet gear (206) comprises two upper and lower gear fixing kits, the radius of the lower gear is larger than the radius of the upper gear, and the planet gear (206) is sleeve-connected with the planet carrier (204) in a tight fitting manner. The sun gear (205) and the planetary gear (206) are sleeved together, the lower gear meshes with the sun gear (205) and the inner gear ring (203), and the upper gear meshes with the output gear shaft (208) and the intermediate gear (207); the second deep groove ball bearing (209) and the output gear shaft (208) are sleeved together in a tight fit; the third deep groove ball bearing (2010) and the second deep groove ball bearing (209) are sleeved together, the number of teeth of the sun gear (205) is less than the number of teeth of the lower gear of the planetary gear (206), and the intermediate gear (207) meshes with the upper gears of the plurality of planetary gears (206).

7. A dual-speed ratio water-air dual-purpose power device according to claim 6, characterized in that: The planet carrier (204) is generally in a flat elliptical shape, with protrusions at both ends being sleeved with the planet wheels (206).

8. The dual-speed ratio water-air dual-purpose power device according to claim 1, characterized in that: The output adapter plate (30) is fastened to the output gear shaft (208) of the speed conversion output device (20) by means of screws.

9. The dual-speed ratio water-air dual-purpose power device according to claim 1, characterized in that: The blade adaptive rotation device (40) comprises: a blade mounting shaft (401) and a blade adaptive adjustment device (402).

10. A dual-speed ratio water-air dual-purpose power device according to claim 9, characterized in that: The blade installation shaft (401) is connected to the output adapter plate (30), and the blade self-adaptive adjustment device (402) is spirally connected to the blade installation shaft (401) and is fastened to the blade (50) via a hinge.

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